Ferentz is the son of Iowa head coach Kirk Ferentz and brother of former Patriots tight ends coach Brian Ferentz, who now coaches offensive line with the Hawkeyes. He came into the NFL as an undrafted free agent out of Iowa in 2014 and has played with the Houston Texans and Denver Broncos. Ferentz was cut by the Broncos on May 10.

Cotton went undrafted out of Nebraska this year. The 6-foot-5, 246-pound tight end caught just 17 passes for 185 yards with three touchdowns in three seasons with the Cornhuskers.